Advertisements
Advertisements
प्रश्न
Exercise.
The values of current (I) flowing through a resistor for various potential differences V across the resistor are given below. What is the value of resistor?
| I (ampere) | 0.5 | 1.0 | 2.0 | 3.0 | 4.0 |
| V (volt) | 1.6 | 3.4 | 6.7 | 10.2 | 13.2 |
Advertisements
उत्तर

Resistance(R) = \[\frac{\text{∆V}}{\text{∆I}}\]
= 10.2 – `"6.7"/"3"` – 2 = 3.5/1
R = 3.5Ω
APPEARS IN
संबंधित प्रश्न
Name three factors on which resistance of a given wire depends and state how is it affected by the factors stated by you.
Draw a I–V graph for a linear resistor. What does its slope represent?
Assertion (A): Copper is used to make electric wires.
Reason (R): Copper has very low electrical resistance.
An electric bulb is rated ‘240 V, 100 W’.
- What information can you get from the above statement?
- What will happen if this bulb is connected across 220 V?
- Calculate the resistance of the bulb.
- Also find the energy consumed by the bulb in 10 minutes.
What is resistance?
Resistors are connected in series if the resistance of the electric circuit is to be ______.
Define the following:
Variable resistor
Observe the given circuit diagram and answer the questions that follow:

- Calculate the resistance of the circuit when the key K completes the circuit.
- Calculate the current through 3Ω resistance when the circuit is complete.
Define the term resistance.
Two copper wires are of the same length, but one is thicker than the other. Which wire will have more specific resistance?
